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GCN Architecture enables the PowerColor Radeon HD 7990 to deliver excellent performance and efficiency. Powered by AMD Radeon HD 7990 engine and a total of 6GB/384-bit x 2 memory, this graphics card tackles your most demanding DirectX 11 titles with monstrous performance. AMD PowerTune and AMD ZeroCore Power technology reduce the energy waste to the minimum, keeping your system cool, quiet and your wallet loaded. And you can also get immersed in gaming and entertainment with AMD Eyefinity Technology.

Dual GPUs on a single board Dual Radeon HD GPUs on a single board with full support for DirectX 11 and scalable geometry processing make the AMD RadeonHD 7990 the fastest graphics processor in the world for unrivalled graphics performance.

More Graphics, Less Power The new GCN architecture of the card gets more usable processing power for your money, enabling better frame rates in the latest games at high resolutions. In addition, with AMD PowerPlay & AMD PowerTune technologies, you can optimize the balance between performance and power consumption of your system by adjusting the engine clock during runtime of the card. Manage the power and keep your wallet loaded!

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WarrantyBeyond any applicable Newegg return policy, this item is warranted independently by the product's Manufacturer or a Third party. Below is a summary provided for convenience only and may not be accurate or current.
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Rating: 2/5Not for use in Scrypt calculations

Pros: This is an extremely high-performance card; for highly-parallellizable tasks, it out-performs even the Radeon 290X, flagship of the current generation. Even if you're running six monitors, all in 3-D, this card is overkill for any real-time application. You can game with this card, and it works great, but you don't buy this card to game; it doesn't offer any real performance advantages over cards costing half the price.

What do you buy this card for? Two words: GPU compute. For integer-dependant, lightly-branched calculations involving large lookup tables or arrays, it's incredibly fast. It's nearly twenty times as fast as my Opteron 6272 at certain tasks--and the 6272 is a sixteen-core server processor. Despite being ~20 times as fast as all 16 cores put together, this card only draws 2-3 times as much power as a typical server processor. It's faster, more energy-efficient, and more purchase-price-effiicient than standard processors for certain tasks.

For well-structured code, this card is reliably an order of magnitude faster than cutting-edge server processors, which are in turn much faster than desktop processors.

Cons: Why is this card about 1/6 the price of the AMD's FirePro S10000? After all, it has similar specifications.

The answer: Reliability. The card I bought had one of its two GPU cores burn out after about 1 month of 24/7 usage. Understand that the card was completely pegged this entire period, dissipating a full 375 watts and sounding rather like a hairdryer. Computational loads are much, much more punishing than gaming, and if you run heavy computations on this card, you may fry it.

This isn't terribly surprising...the 7990 dissipates twice the power of a 7790 in approximately the same amount of space, and 7790s have been known to fry under heavy compute loads, so it's not surprising that the 7990 inherits this problem.

Other Thoughts: The 7990 tries to walk the line between two use cases, and doesn't really fit well in either:

For gaming, it's fast and reliable, but there are very few situations in which it noticeably out-performs cards costing less than half as much.

-Have a mother board that only supports 16x PCI-E when there is only one card present and will drop to 8x*2 when there are two cards present, there by cutting your crossfire performance in half, like the common P8P67 and others.

-Want the power of two 7970s with about 10-20% less power and heat, and in some games better performance.

-Pick one up around $600, anymore and this card makes no sense, since you can by 2 7970s for $620 or so.

-Want to play next gen games better then the next gen consoles.

-Use Open GL apps; this card eats them for dinner, better than anything else, 50% faster than the titan and about 10% faster than 2x 7970s.

-Have a 750 watt or higher power supply

-Want a card that is still better then AMD’s next gen cards even the r9 290x

-Don’t mind messing with the drivers and installing MSI afterburner.

Cons: Don't buy if-

-You want it to work properly out of the box

-You are squeamish when it comes to tweaking things

-You don’t want MSI afterburner running on your computer for along as you have the card, because it will burn its self up if you don’t.

-You don’t have or can’t afford a better CPU cooler (if you can’t why are you looking at this card? ^^), because it will over heat cheap or stock CPU coolers.

-You have a case smaller then full ATX

-Your case is not maxed out with fans, and have plenty of exhaust, you will need more than one 120mm exhaust out the back; for example two 200mm high performance fans exhausting out the top would be ideal.

-You live in a hot area, or don’t have A/C where the room temp is ever close to 80f

-You plan on storing the computer in a cabinet that will restrict air flow, this is a recipe for disaster, it needs to be out in the open.

-You have a power supply below 750 watt, my computer will sits at around 700+ watts when playing a game, so a 650w will NOT work, and if it does, it will be over working and will not last long. If you are going to use a 750w make sure it is from a good company, (well basically corsair).

-You don’t intend on playing next gen games.

-You have less then 4GB of system ram

-You have an older AMD or Intel dual core processor; you will be bottle necking yourself.

-You have a PCI-E SSD or some other hard working card below it that would overheat with the massive amount of heat being blown on and around it.

-All you play is old DX9 games, the performance will be strange, for example GTA4 I only get about 40 fps, and it stutters like crazy, and hilariously I will get 14,000+ fps on the menus and loading screens that will rev the card up to 100% usage and max voltage.

-You expect it to actually have 6GB of Vram, where in reality it will have only 3GB that is mirrored twice for each core, only time will tell if this will be enough for 4k next gen games.

-You are afraid of RMAing a dead unit

-If the card costs more than $600, and you are able to have a crossfire set up.

-You want the divers to work 100% of the time

Other Thoughts: A few things to keep in mind about this card from my experiences, this is definitely an enthusiasts card (obviously) it is going to take some tweaking so it does not burn its self up like my first card did. First off make sure you install the 13.11 beta drivers, and enable frame pacing under the game settings, the card is dirt terrible if you use 13.9. Secondly there are a bunch of serious problems with the ULPS (ultra low power state, it is supposed to turn off the second GPU when it is not needed) on the card. If you leave it on (default) your second GPU will do some strange things, the most benign of which is every time you minimize a game it will switch off and your frames will drop by half, and the only way to get it working again is to restart the game. Furthermore on the more dangerous side some apps they don’t even have to be games, like some antivirus programs and other apps even Skype will sometimes peg your second GPU at max voltage and 100% usage, and to make this worse sometimes the default driver will lose its mind and leave the second GPUs fan at 20% over heating the GPU and crashing the computer. Also even when the GPUs are functioning properly, the AMD’s fan controller is way too worried about noise, the GPUs can be close to 100% load (like during bf4) and the fans will be barley spinning and the card will be burning up at around 100c+. (remember heat kills computer components not just your GPU.) So I would say it is a must to use MSI’s afterburner, first open the catalyst control center and disable overdrive, then install Afterburner and in the settings of AB disable ULPS immediately, and leave it off. Then while in Afterburner, set a custom fan profile, here is mine for a reference point [ http://flic.kr/p/hFJJDB ] it keeps both cores around a silent 40c on desktop use, and with quite a bit of fan noise 60c under high to max load, but it is worth it to me since I don’t really care how loud my computer is with my huge 5.1 headphones. I would also set up the on-screen display for the first few weeks you have the card to make sure everything is working cool and properly. Remember that Afterburner has to be running for the monitoring and the fan controller to work. One other thing, in most games you will want to leave v-sync off, with it on most games will stutter every 3-5 seconds which is really annoying, so I would rather have a little bit of screen tearing occasionally.

Another thing to keep in mind with this card it is bellows heat into your case. If you still have the stock cooler for your CPU or a cheap aftermarket one, you are going to have to buy a huge air cooler like the NH-D14 or sealed water cooler. Because this card will raise the temps of a cheap CPU cooler 20-30c bringing your CPU to dangerous levels. Furthermore make sure you have good airflow, lots of cool air in the front and sides, and as many fans as you can exhausting out the top and rear. If you don’t have full ATX size case or larger, pass on this car

Rating: 1/5Light my fire!

Cons: 60c Idle on bench case102c in game on bench case2nd card was the same

Other Thoughts: Water cooling is a must!

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